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Kim S, Seo SU, Kweon MN. Gut microbiota-derived metabolites tune host homeostasis fate. Semin Immunopathol 2024; 46:2. [PMID: 38990345 PMCID: PMC11239740 DOI: 10.1007/s00281-024-01012-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/15/2024] [Indexed: 07/12/2024]
Abstract
The gut microbiota, housing trillions of microorganisms within the gastrointestinal tract, has emerged as a critical regulator of host health and homeostasis. Through complex metabolic interactions, these microorganisms produce a diverse range of metabolites that substantially impact various physiological processes within the host. This review aims to delve into the intricate relationships of gut microbiota-derived metabolites and their influence on the host homeostasis. We will explore how these metabolites affect crucial aspects of host physiology, including metabolism, mucosal integrity, and communication among gut tissues. Moreover, we will spotlight the potential therapeutic applications of targeting these metabolites to restore and sustain host equilibrium. Understanding the intricate interplay between gut microbiota and their metabolites is crucial for developing innovative strategies to promote wellbeing and improve outcomes of chronic diseases.
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Affiliation(s)
- Seungil Kim
- Mucosal Immunology Laboratory, Department of Convergence Medicine, University of Ulsan College of Medicine / Asan Medical Center, Seoul, Republic of Korea
- Digestive Diseases Research Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sang-Uk Seo
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mi-Na Kweon
- Mucosal Immunology Laboratory, Department of Convergence Medicine, University of Ulsan College of Medicine / Asan Medical Center, Seoul, Republic of Korea.
- Digestive Diseases Research Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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2
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Xie H, Yang N, Lu L, Sun X, Li J, Wang X, Guo H, Zhou L, Liu J, Wu H, Yu C, Zhang W, Lu L. Uremic Toxin Receptor AhR Facilitates Renal Senescence and Fibrosis via Suppressing Mitochondrial Biogenesis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402066. [PMID: 38940381 DOI: 10.1002/advs.202402066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/02/2024] [Indexed: 06/29/2024]
Abstract
Retention of metabolic end-products in the bodily fluids of patients with chronic kidney disease (CKD) may lead to uremia. The uremic toxin indoxyl sulfate (IS), a tryptophan metabolite, is an endogenous ligand of aryl hydrocarbon receptor (AhR). It is clarified that the upregulation and activation of AhR by IS in tubular epithelial cells (TECs) promote renal senescence and fibrosis. Renal TEC-specific knockout of AhR attenuates renal senescence and fibrosis, as well as the suppression of PGC1α-mediated mitochondrial biogenesis in ischemia reperfusion (IR)- or IS-treated CKD mice kidneys. Overexpression of peroxisome proliferator-activated receptor gamma coactivator 1-α (PGC1α) attenuates IS-induced cell senescence and extracellular matrix production in cultured TECs. Mechanistically, AhR is able to interact with PGC1α and promotes the ubiquitin degradation of PGC1α via its E3 ubiquitin ligase activity. In summary, the elevation and activation of AhR by the accumulated uremic toxins in the progression of CKD accelerate renal senescence and fibrosis by suppressing mitochondrial biogenesis via promoting ubiquitination and proteasomal degradation of PGC1α.
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Affiliation(s)
- Hongyan Xie
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
- Department of Nephrology, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
| | - Ninghao Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Li Lu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Dali University, Dali, Yunnan, 671013, China
| | - Xi'ang Sun
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Jingyao Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Xin Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Hengjiang Guo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Li Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Jun Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Huijuan Wu
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Chen Yu
- Department of Nephrology, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, China
| | - Wei Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Limin Lu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
- National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Shanghai Kidney Development and Pediatric Kidney Disease Research Center, Shanghai, 201102, China
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3
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Zhang J, Liu Y, Zhi X, Xu L, Tao J, Cui D, Liu TF. Tryptophan catabolism via the kynurenine pathway regulates infection and inflammation: from mechanisms to biomarkers and therapies. Inflamm Res 2024; 73:979-996. [PMID: 38592457 DOI: 10.1007/s00011-024-01878-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/24/2024] [Accepted: 03/27/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND L-Tryptophan (L-Trp), an essential amino acid, is the only amino acid whose level is regulated specifically by immune signals. Most proportions of Trp are catabolized via the kynurenine (Kyn) pathway (KP) which has evolved to align the food availability and environmental stimulation with the host pathophysiology and behavior. Especially, the KP plays an indispensable role in balancing the immune activation and tolerance in response to pathogens. SCOPE OF REVIEW In this review, we elucidate the underlying immunological regulatory network of Trp and its KP-dependent catabolites in the pathophysiological conditions by participating in multiple signaling pathways. Furthermore, the KP-based regulatory roles, biomarkers, and therapeutic strategies in pathologically immune disorders are summarized covering from acute to chronic infection and inflammation. MAJOR CONCLUSIONS The immunosuppressive effects dominate the functions of KP induced-Trp depletion and KP-produced metabolites during infection and inflammation. However, the extending minor branches from the KP are not confined to the immune tolerance, instead they go forward to various functions according to the specific condition. Nevertheless, persistent efforts should be made before the clinical use of KP-based strategies to monitor and cure infectious and inflammatory diseases.
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Affiliation(s)
- Jingpu Zhang
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China.
| | - Yanlei Liu
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China
| | - Xiao Zhi
- Shanghai Institute of Virology, Shanghai Jiao Tong University School of Medicine, 227 South Chongqing Road, Shanghai, 200025, People's Republic of China
| | - Li Xu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China
| | - Jie Tao
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China
| | - Daxiang Cui
- Institute of Nano Biomedicine and Engineering, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China
| | - Tie Fu Liu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, 2901 Caolang Highway, Shanghai, 201508, People's Republic of China.
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4
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Lu ZF, Hsu CY, Younis NK, Mustafa MA, Matveeva EA, Al-Juboory YHO, Adil M, Athab ZH, Abdulraheem MN. Exploring the significance of microbiota metabolites in rheumatoid arthritis: uncovering their contribution from disease development to biomarker potential. APMIS 2024; 132:382-415. [PMID: 38469726 DOI: 10.1111/apm.13401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/27/2024] [Indexed: 03/13/2024]
Abstract
Rheumatoid arthritis (RA) is a multifaceted autoimmune disorder characterized by chronic inflammation and joint destruction. Recent research has elucidated the intricate interplay between gut microbiota and RA pathogenesis, underscoring the role of microbiota-derived metabolites as pivotal contributors to disease development and progression. The human gut microbiota, comprising a vast array of microorganisms and their metabolic byproducts, plays a crucial role in maintaining immune homeostasis. Dysbiosis of this microbial community has been linked to numerous autoimmune disorders, including RA. Microbiota-derived metabolites, such as short-chain fatty acids (SCFAs), tryptophan derivatives, Trimethylamine-N-oxide (TMAO), bile acids, peptidoglycan, and lipopolysaccharide (LPS), exhibit immunomodulatory properties that can either exacerbate or ameliorate inflammation in RA. Mechanistically, these metabolites influence immune cell differentiation, cytokine production, and gut barrier integrity, collectively shaping the autoimmune milieu. This review highlights recent advances in understanding the intricate crosstalk between microbiota metabolites and RA pathogenesis and also discusses the potential of specific metabolites to trigger or suppress autoimmunity, shedding light on their molecular interactions with immune cells and signaling pathways. Additionally, this review explores the translational aspects of microbiota metabolites as diagnostic and prognostic tools in RA. Furthermore, the challenges and prospects of translating these findings into clinical practice are critically examined.
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Affiliation(s)
- Zi-Feng Lu
- Heilongjiang Beidahuang Group General Hospital, Heilongjiang, China
| | - Chou-Yi Hsu
- Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | | | - Mohammed Ahmed Mustafa
- Department of Medical Laboratory Technology, University of Imam Jaafar AL-Sadiq, Kirkuk, Iraq
| | - Elena A Matveeva
- Department of Orthopaedic Dentistry, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | | | - Mohaned Adil
- Pharmacy College, Al-Farahidi University, Baghdad, Iraq
| | - Zainab H Athab
- Department of Pharmacy, Al-Zahrawi University College, Karbala, Iraq
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5
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Veland N, Gleneadie HJ, Brown KE, Sardini A, Pombo J, Dimond A, Burns V, Sarkisyan K, Schiering C, Webster Z, Merkenschlager M, Fisher AG. Bioluminescence imaging of Cyp1a1-luciferase reporter mice demonstrates prolonged activation of the aryl hydrocarbon receptor in the lung. Commun Biol 2024; 7:442. [PMID: 38600349 PMCID: PMC11006662 DOI: 10.1038/s42003-024-06089-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 03/21/2024] [Indexed: 04/12/2024] Open
Abstract
Aryl hydrocarbon receptor (AHR) signalling integrates biological processes that sense and respond to environmental, dietary, and metabolic challenges to ensure tissue homeostasis. AHR is a transcription factor that is inactive in the cytosol but upon encounter with ligand translocates to the nucleus and drives the expression of AHR targets, including genes of the cytochrome P4501 family of enzymes such as Cyp1a1. To dynamically visualise AHR activity in vivo, we generated reporter mice in which firefly luciferase (Fluc) was non-disruptively targeted into the endogenous Cyp1a1 locus. Exposure of these animals to FICZ, 3-MC or to dietary I3C induced strong bioluminescence signal and Cyp1a1 expression in many organs including liver, lung and intestine. Longitudinal studies revealed that AHR activity was surprisingly long-lived in the lung, with sustained Cyp1a1 expression evident in discrete populations of cells including columnar epithelia around bronchioles. Our data link diet to lung physiology and also reveal the power of bespoke Cyp1a1-Fluc reporters to longitudinally monitor AHR activity in vivo.
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Affiliation(s)
- Nicolas Veland
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK
| | - Hannah J Gleneadie
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK
| | - Karen E Brown
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK
| | - Alessandro Sardini
- Whole Animal Physiology and Imaging, MRC Laboratory of Medical Sciences, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Joaquim Pombo
- Senescence Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Andrew Dimond
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK
- Department of Biochemistry, University of Oxford, Oxford, OX1 3QU, UK
| | - Vanessa Burns
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK
| | - Karen Sarkisyan
- Synthetic Biology Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Chris Schiering
- Inflammation and Obesity Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Zoe Webster
- Transgenics & Embryonic Stem Cell Facility, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Matthias Merkenschlager
- Lymphocyte Development Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 0HS, UK
| | - Amanda G Fisher
- Epigenetic Memory Group, MRC Laboratory of Medical Sciences, Imperial College London Hammersmith Hospital Campus, Du Cane Road, London, W12 OHS, UK.
- Department of Biochemistry, University of Oxford, Oxford, OX1 3QU, UK.
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6
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Smits JPH, Qu J, Pardow F, van den Brink NJM, Rodijk-Olthuis D, van Vlijmen-Willems IMJJ, van Heeringen SJ, Zeeuwen PLJM, Schalkwijk J, Zhou H, van den Bogaard EH. The Aryl Hydrocarbon Receptor Regulates Epidermal Differentiation through Transient Activation of TFAP2A. J Invest Dermatol 2024:S0022-202X(24)00114-3. [PMID: 38401701 DOI: 10.1016/j.jid.2024.01.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/26/2024]
Abstract
The aryl hydrocarbon receptor (AHR) is an evolutionary conserved environmental sensor identified as an indispensable regulator of epithelial homeostasis and barrier organ function. Molecular signaling cascade and target genes upon AHR activation and their contribution to cell and tissue function are however not fully understood. Multiomics analyses using human skin keratinocytes revealed that upon ligand activation, AHR binds open chromatin to induce expression of transcription factors, for example, TFAP2A, as a swift response to environmental stimuli. The terminal differentiation program, including upregulation of barrier genes, FLG and keratins, was mediated by TFAP2A as a secondary response to AHR activation. The role of AHR-TFAP2A axis in controlling keratinocyte terminal differentiation for proper barrier formation was further confirmed using CRISPR/Cas9 in human epidermal equivalents. Overall, the study provides additional insights into the molecular mechanism behind AHR-mediated barrier function and identifies potential targets for the treatment of skin barrier diseases.
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Affiliation(s)
- Jos P H Smits
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands; Department of Dermatology, University Hospital Düsseldorf, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Jieqiong Qu
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Felicitas Pardow
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands; Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Noa J M van den Brink
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Diana Rodijk-Olthuis
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | | | - Simon J van Heeringen
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Patrick L J M Zeeuwen
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Joost Schalkwijk
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Huiqing Zhou
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands; Department of Human Genetics, Radboudumc, Nijmegen, The Netherlands.
| | - Ellen H van den Bogaard
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands.
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7
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Cui W, Guo M, Liu D, Xiao P, Yang C, Huang H, Liang C, Yang Y, Fu X, Zhang Y, Liu J, Shi S, Cong J, Han Z, Xu Y, Du L, Yin C, Zhang Y, Sun J, Gu W, Chai R, Zhu S, Chu B. Gut microbial metabolite facilitates colorectal cancer development via ferroptosis inhibition. Nat Cell Biol 2024; 26:124-137. [PMID: 38168770 DOI: 10.1038/s41556-023-01314-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/15/2023] [Indexed: 01/05/2024]
Abstract
The gut microbiota play a pivotal role in human health. Emerging evidence indicates that gut microbes participate in the progression of tumorigenesis through the generation of carcinogenic metabolites. However, the underlying molecular mechanism is largely unknown. In the present study we show that a tryptophan metabolite derived from Peptostreptococcus anaerobius, trans-3-indoleacrylic acid (IDA), facilitates colorectal carcinogenesis. Mechanistically, IDA acts as an endogenous ligand of an aryl hydrocarbon receptor (AHR) to transcriptionally upregulate the expression of ALDH1A3 (aldehyde dehydrogenase 1 family member A3), which utilizes retinal as a substrate to generate NADH, essential for ferroptosis-suppressor protein 1(FSP1)-mediated synthesis of reduced coenzyme Q10. Loss of AHR or ALDH1A3 largely abrogates IDA-promoted tumour development both in vitro and in vivo. It is interesting that P. anaerobius is significantly enriched in patients with colorectal cancer (CRC). IDA treatment or implantation of P. anaerobius promotes CRC progression in both xenograft model and ApcMin/+ mice. Together, our findings demonstrate that targeting the IDA-AHR-ALDH1A3 axis should be promising for ferroptosis-related CRC treatment.
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Affiliation(s)
- Weiwei Cui
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Meng Guo
- Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Dong Liu
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Peng Xiao
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Chuancheng Yang
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Haidi Huang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, Sheng Yushou Center of Cell Biology and Immunology, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Chunhui Liang
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yinghong Yang
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiaolong Fu
- State Key Laboratory of Digital Medical Engineering, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing, China
| | - Yudan Zhang
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jiaxing Liu
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shuang Shi
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, China
| | - Jingjing Cong
- Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Zili Han
- Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yunfei Xu
- Qilu hospital of Shandong University, Jinan, China
| | - Lutao Du
- Qilu hospital of Shandong University, Jinan, China
| | - Chengqian Yin
- Institute for Cancer Research, Shenzhen Bay Laboratory, Shenzhen, China
| | - Yongchun Zhang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, Sheng Yushou Center of Cell Biology and Immunology, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Jinpeng Sun
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wei Gu
- Institute for Cancer Genetics, and Department of Pathology and Cell Biology, and Herbert Irving Comprehensive Cancer Center, College of Physicians & Surgeons, Columbia University, New York, NY, USA.
| | - Renjie Chai
- State Key Laboratory of Digital Medical Engineering, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing, China.
- Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, China.
- School of Life Science, Beijing Institute of Technology, Beijing, China.
- Department of Otolaryngology Head and Neck Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.
| | - Shu Zhu
- Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
- Hefei National Laboratory for Physical Sciences at Microscale, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
| | - Bo Chu
- Department of Cell Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
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8
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Zhang Q, Goswami S, Yilmaz O. Microbial regulation of ferroptosis in cancer. Nat Cell Biol 2024; 26:41-42. [PMID: 38168771 DOI: 10.1038/s41556-023-01321-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Affiliation(s)
- Qiming Zhang
- Department of Biology, The David H. Koch Institute for Integrative Cancer Research at MIT, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Swagata Goswami
- Department of Biology, The David H. Koch Institute for Integrative Cancer Research at MIT, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Omer Yilmaz
- Department of Biology, The David H. Koch Institute for Integrative Cancer Research at MIT, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Department of Pathology, Massachusetts General Hospital and Beth Israel Deaconness Medical Center and Harvard Medical School, Boston, MA, USA.
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9
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Chen Y, Abbass M, Brock T, Hobbs G, Ciufo LA, Hopkins C, Arlt VM, Stürzenbaum SR. Environmental carcinogen benzo[a]pyrene alters neutral lipid storage via a cyp-35A2 mediated pathway in Caenorhabditis elegans. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 339:122731. [PMID: 37839680 DOI: 10.1016/j.envpol.2023.122731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/28/2023] [Accepted: 10/11/2023] [Indexed: 10/17/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), in particular benzo [a]pyrene (BaP), have been identified as carcinogenic components of tobacco smoke. In mammals, the toxicological response to BaP-diol-epoxide is driven by cytochrome P450 (CYP1A1), a pathway which is absent in Caenorhabditis elegans. In contrast, in worms prominently the CYP-35 enzyme family seems to be induced after BaP exposure. In C. elegans, BaP exposure reduces the accumulation of lysosomal neutral lipids in a dose dependent manner and the deletion of cyp-35A2 results in a significant elevation of neutral lipid metabolism. A cyp-35A2:mCherry;unc-47:GFP dual-labelled reporter strain facilitated the identification of three potential upstream regulators that drive BaP metabolism in worms, namely elt-2, nhr-49 and fos-1. This newly described reporter line is a powerful resource for future large-scale RNAi regarding toxicology and lipid metabolism screens.
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Affiliation(s)
- Yuzhi Chen
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK
| | - Mustafa Abbass
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK
| | | | - Gian Hobbs
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK
| | - Leonardo A Ciufo
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK
| | | | - Volker M Arlt
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK; Toxicology Department, GAB Consulting GmbH, 69126 Heidelberg, Germany
| | - Stephen R Stürzenbaum
- King's College London, Faculty of Life Sciences and Medicine, Analytical, Environmental and Forensic Sciences Department, London, SE1 9NH, UK.
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10
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Ranhotra HS. Discrete interplay of gut microbiota L-tryptophan metabolites in host biology and disease. Mol Cell Biochem 2023:10.1007/s11010-023-04867-0. [PMID: 37861881 DOI: 10.1007/s11010-023-04867-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 09/24/2023] [Indexed: 10/21/2023]
Abstract
The gut microbiota and the host maintain a conjoint relationship and together achieve optimal physiology via a multitude of interactive signalling cues. Dietary-derived L-tryptophan (L-trp) is enzymatically metabolized by the resident symbiotic gut microbiota to indole and various indole derivatives. Indole and indole metabolites secreted by the gut bacteria act locally in the intestinal cells as well as distally and modulate tissue-specific functions which are beneficial to the host. Functions attributed to these microbial indole metabolites in the host include regulation of intestinal permeability, immunity and mucosal roles, inflammation, and insulin sensitivity. On the other hand, dysregulation of gut microbiota L-trp metabolism compromises the optimal availability of indole and indole metabolites and can induce the onset of metabolic disorders, inflammation, liver steatosis, and decrease gut barrier integrity. Gut dysbiosis is regarded as one of the prime reasons for this deregulated microbial-derived indole metabolites. A number of indole metabolites from the gut bacteria have been identified recently displaying variable affinity towards xenobiotic nuclear receptors. Microbial metabolite mimicry concept can be used to design and develop novel indole-moiety-containing compounds with higher affinity towards the receptors and efficacy in preclinical studies. Such compounds may serve as therapeutic drugs in clinical trials in the future. In this article, I review L-trp metabolism in the host and gut microbiota and the various physiological functions, patho-physiologies associated with the microbial-released indole metabolites in the host, including the metabolite mimicry-based concept to develop tailored indole-containing novel experimental drugs.
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Affiliation(s)
- Harmit S Ranhotra
- Department of Biochemistry, St. Edmund's College, Shillong, 793 003, India.
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11
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Alluli A, Rijnbout St James W, Eidelman DH, Baglole CJ. Dynamic relationship between the aryl hydrocarbon receptor and long noncoding RNA balances cellular and toxicological responses. Biochem Pharmacol 2023; 216:115745. [PMID: 37597813 DOI: 10.1016/j.bcp.2023.115745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
The aryl hydrocarbon receptor (AhR) is a cytosolic transcription factor activated by endogenous ligands and xenobiotic chemicals. Once the AhR is activated, it translocates to the nucleus, dimerizes with the AhR nuclear translator (ARNT) and binds to xenobiotic response elements (XRE) to promote gene transcription, notably the cytochrome P450 CYP1A1. The AhR not only mediates the toxic effects of environmental chemicals, but also has numerous putative physiological functions. This dichotomy in AhR biology may be related to reciprocal regulation of long non-coding RNA (lncRNA). lncRNA are defined as transcripts more than 200 nucleotides in length that do not encode a protein but are implicated in many physiological processes such as cell differentiation, cell proliferation, and apoptosis. lncRNA are also linked to disease pathogenesis, particularly the development of cancer. Recent studies have revealed that AhR activation by environmental chemicals affects the expression and function of lncRNA. In this article, we provide an overview of AhR signaling pathways activated by diverse ligands and highlight key differences in the putative biological versus toxicological response of AhR activation. We also detail the functions of lncRNA and provide current data on their regulation by the AhR. Finally, we outline how overlap in function between AhR and lncRNA may be one way in which AhR can be both a regulator of endogenous functions but also a mediator of toxicological responses to environmental chemicals. Overall, more research is still needed to fully understand the dynamic interplay between the AhR and lncRNA.
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Affiliation(s)
- Aeshah Alluli
- Meakins-Christie Laboratories, McGill University, Canada; Translational Research in Respiratory Diseases Program at the Research Institute of the McGill University Health Centre, Canada; Department of Pathology, McGill University, Canada
| | - Willem Rijnbout St James
- Meakins-Christie Laboratories, McGill University, Canada; Translational Research in Respiratory Diseases Program at the Research Institute of the McGill University Health Centre, Canada; Department of Pathology, McGill University, Canada
| | - David H Eidelman
- Meakins-Christie Laboratories, McGill University, Canada; Department of Medicine, McGill University, Canada
| | - Carolyn J Baglole
- Meakins-Christie Laboratories, McGill University, Canada; Translational Research in Respiratory Diseases Program at the Research Institute of the McGill University Health Centre, Canada; Department of Pathology, McGill University, Canada; Department of Medicine, McGill University, Canada; Department of Pharmacology and Therapeutics, McGill University, Canada.
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12
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Abstract
Endogenous photosensitizers play a critical role in both beneficial and harmful light-induced transformations in biological systems. Understanding their mode of action is essential for advancing fields such as photomedicine, photoredox catalysis, environmental science, and the development of sun care products. This review offers a comprehensive analysis of endogenous photosensitizers in human skin, investigating the connections between their electronic excitation and the subsequent activation or damage of organic biomolecules. We gather the physicochemical and photochemical properties of key endogenous photosensitizers and examine the relationships between their chemical reactivity, location within the skin, and the primary biochemical events following solar radiation exposure, along with their influence on skin physiology and pathology. An important take-home message of this review is that photosensitization allows visible light and UV-A radiation to have large effects on skin. The analysis presented here unveils potential causes for the continuous increase in global skin cancer cases and emphasizes the limitations of current sun protection approaches.
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Affiliation(s)
- Erick L Bastos
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
| | - Frank H Quina
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
- Department of Chemical Engineering, Polytechnic School, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
| | - Maurício S Baptista
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
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13
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Alangari AA, Ashoori MD, Alwan W, Dawe HR, Stockinger B, Barker JN, Wincent E, Di Meglio P. Manuka honey activates the aryl hydrocarbon receptor: Implications for skin inflammation. Pharmacol Res 2023; 194:106848. [PMID: 37419256 DOI: 10.1016/j.phrs.2023.106848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/09/2023]
Abstract
Manuka honey (MH) is a complex nutritional material with antimicrobial, antioxidant and anti-inflammatory activity. We have previously shown that MH down regulates IL-4-induced CCL26 expression in immortalized keratinocytes. As MH contains potential ligands of the Aryl Hydrocarbon Receptor (AHR), a key regulator of skin homeostasis, we hypothesize that this effect is mediated via AHR activation. Here, we treated HaCaT cell lines, either stable transfected with an empty vector (EV-HaCaT) or in which AHR had been stable silenced (AHR-silenced HaCaT); or primary normal human epithelial keratinocytes (NHEK) with 2% MH for 24 h. This induced a 15.4-fold upregulation of CYP1A1 in EV-HaCaTs, which was significantly reduced in AHR-silenced cells. Pre-treatment with the AHR antagonist CH223191 completely abrogated this effect. Similar findings were observed in NHEK. In vivo treatment of the Cyp1a1Cre x R26ReYFP reporter mice strain's skin with pure MH significantly induced CYP1A1 expression compared with Vaseline. Treatment of HaCaT with 2% MH significantly decreased baseline CYP1 enzymatic activity at 3 and 6 h but increased it after 12 h, suggesting that MH may activate the AHR both through direct and indirect means. Importantly, MH downregulation of IL-4-induced CCL26 mRNA and protein was abrogated in AHR-silenced HaCaTs and by pre-treatment with CH223191. Finally, MH significantly upregulated FLG expression in NHEK in an AHR-dependent manner. In conclusion, MH activates AHR, both in vitro and in vivo, thereby providing a mechanism of its IL4-induced CCL26 downregulation and upregulation of FLG expression. These results have potential clinical implications for atopic diseases and beyond.
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Affiliation(s)
- Abdullah A Alangari
- Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia; St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK.
| | - Matin D Ashoori
- St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Wisam Alwan
- St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Hannah R Dawe
- St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | | | - Jonathan N Barker
- St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK
| | - Emma Wincent
- Institute of Environmental Medicine, The Karolinska Institute, Stockholm, Sweden
| | - Paola Di Meglio
- St. John's Institute of Dermatology, School of Basic and Medical Biosciences, King's College London, London, UK.
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14
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Chen X, Patterson AD, Perdew GH, Murray IA, Kellogg JJ. Molecular networking identifies an AHR-modulating benzothiazole from white button mushrooms ( Agaricus bisporus). J Funct Foods 2023; 106:105602. [PMID: 37397272 PMCID: PMC10312048 DOI: 10.1016/j.jff.2023.105602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023] Open
Abstract
Diet-derived aryl hydrocarbon receptor (AHR) ligands have potential to maintain gut health. However, among the myriad bioactive compounds from foods, identifying novel functional ligands which would significantly impact gastrointestinal health is a challenge. In this study, a novel AHR modulator is predicted, identified, and characterized in the white button mushroom (Agaricus bisporus). Using a molecular networking approach, a methylated analog to benzothiazole was indicated in white button mushrooms, which was subsequently isolated and identified as 2-amino-4-methyl-benzothiazole(2A4). Cell-based AHR transcriptional assays revealed that 2-amino-4-methyl-benzothiazole possesses agonistic activity and upregulated CYP1A1 expression. This contrasts with previous findings that whole white button mushroom extract has overall antagonistic activity in vivo, underscoring the importance of studying the roles each chemical component plays in a whole food. The findings suggest that 2-amino-4-methyl-benzothiazole is a previously unidentified AHR modulator from white button mushroom and demonstrate that molecular networking has potential to identify novel receptor modulators from natural products.
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15
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Sládeková L, Mani S, Dvořák Z. Ligands and agonists of the aryl hydrocarbon receptor AhR: Facts and myths. Biochem Pharmacol 2023; 213:115626. [PMID: 37247746 DOI: 10.1016/j.bcp.2023.115626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 05/31/2023]
Abstract
The aryl hydrocarbon receptor (AhR) belongs to the essential helix-loop-helix transcription factors family. This receptor has a central role in determining host physiology and a variety of pathophysiologies ranging from inflammation and metabolism to cancer. AhR is a ligand-driven receptor with intricate pharmacology of activation depending on the type and quantity of ligand present. Therefore, a better understanding of AhR ligands per se is critical to move the field forward. In this minireview, we clarify some facts and myths about AhR ligands and how further studies could shed light on the true nature of AhR activation by these ligands. The review covers select chemical classes and explores parameters that qualify them as true receptor ligands.
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Affiliation(s)
- Lucia Sládeková
- Department of Cell Biology and Genetics, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Sridhar Mani
- Department of Genetics and Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Zdeněk Dvořák
- Department of Cell Biology and Genetics, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.
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16
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Li S. Modulation of immunity by tryptophan microbial metabolites. Front Nutr 2023; 10:1209613. [PMID: 37521424 PMCID: PMC10382180 DOI: 10.3389/fnut.2023.1209613] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 05/30/2023] [Indexed: 08/01/2023] Open
Abstract
Tryptophan (Trp) is an essential amino acid that can be metabolized via endogenous and exogenous pathways, including the Kynurenine Pathway, the 5-Hydroxyindole Pathway (also the Serotonin pathway), and the Microbial pathway. Of these, the Microbial Trp metabolic pathways in the gut have recently been extensively studied for their production of bioactive molecules. The gut microbiota plays an important role in host metabolism and immunity, and microbial Trp metabolites can influence the development and progression of various diseases, including inflammatory, cardiovascular diseases, neurological diseases, metabolic diseases, and cancer, by mediating the body's immunity. This review briefly outlines the crosstalk between gut microorganisms and Trp metabolism in the body, starting from the three metabolic pathways of Trp. The mechanisms by which microbial Trp metabolites act on organism immunity are summarized, and the potential implications for disease prevention and treatment are highlighted.
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17
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Smits JP, Qu J, Pardow F, van den Brink NJ, Rodijk-Olthuis D, van Vlijmen-Willems IM, van Heeringen SJ, Zeeuwen PL, Schalkwijk J, Zhou H, van den Bogaard EH. The aryl hydrocarbon receptor regulates epidermal differentiation through transient activation of TFAP2A. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.07.544032. [PMID: 37333234 PMCID: PMC10274772 DOI: 10.1101/2023.06.07.544032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
The aryl hydrocarbon receptor (AHR) is an evolutionary conserved environmental sensor identified as indispensable regulator of epithelial homeostasis and barrier organ function. Molecular signaling cascade and target genes upon AHR activation and their contribution to cell and tissue function are however not fully understood. Multi-omics analyses using human skin keratinocytes revealed that, upon ligand activation, AHR binds open chromatin to induce expression of transcription factors (TFs), e.g., Transcription Factor AP-2α (TFAP2A), as a swift response to environmental stimuli. The terminal differentiation program including upregulation of barrier genes, filaggrin and keratins, was mediated by TFAP2A as a secondary response to AHR activation. The role of AHR-TFAP2A axis in controlling keratinocyte terminal differentiation for proper barrier formation was further confirmed using CRISPR/Cas9 in human epidermal equivalents. Overall, the study provides novel insights into the molecular mechanism behind AHR-mediated barrier function and potential novel targets for the treatment of skin barrier diseases.
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Affiliation(s)
- Jos P.H. Smits
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
- Department of Dermatology, University Hospital Düsseldorf, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Jieqiong Qu
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Felicitas Pardow
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Noa J.M. van den Brink
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Diana Rodijk-Olthuis
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | | | - Simon J. van Heeringen
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Patrick L.J.M. Zeeuwen
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Joost Schalkwijk
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
| | - Huiqing Zhou
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University, Nijmegen, The Netherlands
- Department of Human Genetics, Radboudumc
| | - Ellen H. van den Bogaard
- Department of Dermatology, Radboud Research Institute for Medical Innovation, Radboudumc, Nijmegen, The Netherlands
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18
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Ma M, Wang Y, Fan S, Huang Y, Su X, Lu C. Urolithin A Alleviates Colitis in Mice by Improving Gut Microbiota Dysbiosis, Modulating Microbial Tryptophan Metabolism, and Triggering AhR Activation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:7710-7722. [PMID: 37167350 DOI: 10.1021/acs.jafc.3c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Urolithin A (UroA) is a microbial metabolite derived from ellagitannins and ellagic acid with good bioavailability. In this study, we explored the anticolitis activity of UroA and clarified the mechanism by 16S rDNA sequencing and metabonomics. UroA alleviated dextran sulfate sodium (DSS)-induced colitis in mice, characterized by a decreased disease activity index, increased colon length, and improved colonic histopathological lesions, along with inhibited phosphorylation of the mitogen-activated protein kinase signaling pathway. In addition, UroA improved gut microbiota dysbiosis and modulated the microbiota metabolome. Furthermore, targeted metabolomics focused on tryptophan catabolites showed that UroA significantly increased the production of indole-3-aldehyde (IAld) and subsequently led to increased colonic expression of aryl hydrocarbon receptor (AhR) and promoted the serum content of IL-22 in mice with colitis. Collectively, our data identified a novel anticolitis mechanism of UroA by improving gut microbiota dysbiosis, modulating microbial tryptophan metabolism, promoting IAld production, and triggering AhR/IL-22 axis activation. However, a limitation noted in this study is that these beneficial effects of UroA were found at 50 μM in vitro and 20 mg/kg in vivo, which were nonphysiological concentrations.
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Affiliation(s)
- Mingxia Ma
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- School of Marine Science, Ningbo University, Ningbo City 315832, China
| | - Yanxin Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- School of Marine Science, Ningbo University, Ningbo City 315832, China
| | - Siqing Fan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo City 315832, China
| | - Yumeng Huang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- School of Marine Science, Ningbo University, Ningbo City 315832, China
| | - Xiurong Su
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- School of Marine Science, Ningbo University, Ningbo City 315832, China
| | - Chenyang Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo City 315211, China
- School of Marine Science, Ningbo University, Ningbo City 315832, China
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19
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Zhang Y, Chen R, Zhang D, Qi S, Liu Y. Metabolite interactions between host and microbiota during health and disease: Which feeds the other? Biomed Pharmacother 2023; 160:114295. [PMID: 36709600 DOI: 10.1016/j.biopha.2023.114295] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/20/2023] [Accepted: 01/20/2023] [Indexed: 01/30/2023] Open
Abstract
Metabolites produced by the host and microbiota play a crucial role in how human bodies develop and remain healthy. Most of these metabolites are produced by microbiota and hosts in the digestive tract. Metabolites in the gut have important roles in energy metabolism, cellular communication, and host immunity, among other physiological activities. Although numerous host metabolites, such as free fatty acids, amino acids, and vitamins, are found in the intestine, metabolites generated by gut microbiota are equally vital for intestinal homeostasis. Furthermore, microbiota in the gut is the sole source of some metabolites, including short-chain fatty acids (SCFAs). Metabolites produced by microbiota, such as neurotransmitters and hormones, may modulate and significantly affect host metabolism. The gut microbiota is becoming recognized as a second endocrine system. A variety of chronic inflammatory disorders have been linked to aberrant host-microbiota interplays, but the precise mechanisms underpinning these disturbances and how they might lead to diseases remain to be fully elucidated. Microbiome-modulated metabolites are promising targets for new drug discovery due to their endocrine function in various complex disorders. In humans, metabolotherapy for the prevention or treatment of various disorders will be possible if we better understand the metabolic preferences of bacteria and the host in specific tissues and organs. Better disease treatments may be possible with the help of novel complementary therapies that target host or bacterial metabolism. The metabolites, their physiological consequences, and functional mechanisms of the host-microbiota interplays will be highlighted, summarized, and discussed in this overview.
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Affiliation(s)
- Yan Zhang
- Department of Anethesiology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.
| | - Rui Chen
- Department of Pediatrics, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.
| | - DuoDuo Zhang
- Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, Jilin Province 130021, People's Republic of China.
| | - Shuang Qi
- Department of Anethesiology, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.
| | - Yan Liu
- Department of Hand and Foot Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People's Republic of China.
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20
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Helm EY, Zhou L. Transcriptional regulation of innate lymphoid cells and T cells by aryl hydrocarbon receptor. Front Immunol 2023; 14:1056267. [PMID: 37056785 PMCID: PMC10089284 DOI: 10.3389/fimmu.2023.1056267] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 03/10/2023] [Indexed: 03/30/2023] Open
Abstract
The aryl hydrocarbon receptor (Ahr) is a ligand-dependent transcription factor and facilitates immune cell environmental sensing through its activation by cellular, dietary, and microbial metabolites, as well as environmental toxins. Although expressed in various cell types, Ahr in innate lymphoid cells (ILCs) and their adaptive T cell counterparts regulates essential aspects of their development and function. As opposed to T cells, ILCs exclusively rely on germ-line encoded receptors for activation, but often share expression of core transcription factors and produce shared effector molecules with their T cell counterparts. As such, core modules of transcriptional regulation are both shared and diverge between ILCs and T cells. In this review, we highlight the most recent findings regarding Ahr’s transcriptional regulation of both ILCs and T cells. Furthermore, we focus on insights elucidating the shared and distinct mechanisms by which Ahr regulates both innate and adaptive lymphocytes.
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21
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Madison CA, Hillbrick L, Kuempel J, Albrecht GL, Landrock KK, Safe S, Chapkin RS, Eitan S. Intestinal epithelium aryl hydrocarbon receptor is involved in stress sensitivity and maintaining depressive symptoms. Behav Brain Res 2023; 440:114256. [PMID: 36528169 PMCID: PMC9839636 DOI: 10.1016/j.bbr.2022.114256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 12/03/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
The aryl hydrocarbon receptor (AhR) is a key regulator in the microbiome-gut-brain axis, and AhR-active microbial metabolites modulate multiple neuronal responses. We recently demonstrated that 3,3'-diindolylmethane (DIM) and 1,4-dihydroxy-2-naphthoic acid (DHNA), two selective AhR modulators (SAhRMs), act as antidepressants in female mice. Thus, to examine the role of intestinal AhR in depression, anxiety, and spatial learning, this study employed transgenic mice in which the AhR was knockout only in the intestinal epithelium (AhRΔIEC). Additionally, this study examined whether the antidepressant effects of dietary DIM and DHNA is mediated by intestinal AhR. AhRΔIEC and WT female mice were fed daily with vehicle, 20 mg/kg DIM or DHNA for three weeks prior to four weeks of unpredictable chronic mild stress (UCMS). Mice were examined for weight gain, anhedonia-like behavior (sucrose preference test), anxiety levels (open field, light/dark, elevated plus maze, novelty-induced hypophagia, and marble burying tests), and spatial learning (Morris water maze). UCMS reduced weight gain in AhRΔIECs, but not WTs. Moreover, UCMS initially reduced sucrose preference in both AhRΔIECs and WTs, but over 4 weeks of UCMS, AhRΔIECs develop resilience to UCMS-induced anhedonia. Additionally, AhRΔIECs exhibit slightly reduced anxiety in certain tests and faster spatial learning. DIM and DHNA acted as antidepressants in both AhRΔIECs and WTs. Thus, this study suggests that intestinal AhR plays differential roles, mitigating stress effects on weight gain, and increasing stress effects on mood. However, the site of antidepressant action of SAhRMs, such as DIM and DHNA, is not dependent on the expression of intestinal AhR.
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Affiliation(s)
- Caitlin A Madison
- Behavioral and Cellular Neuroscience, Department of Psychological and Brain Sciences, Texas A&M University, 4235 TAMU, College Station, TX 77843, USA
| | - Lauren Hillbrick
- Behavioral and Cellular Neuroscience, Department of Psychological and Brain Sciences, Texas A&M University, 4235 TAMU, College Station, TX 77843, USA
| | - Jacob Kuempel
- Behavioral and Cellular Neuroscience, Department of Psychological and Brain Sciences, Texas A&M University, 4235 TAMU, College Station, TX 77843, USA
| | - Georgia Lee Albrecht
- Behavioral and Cellular Neuroscience, Department of Psychological and Brain Sciences, Texas A&M University, 4235 TAMU, College Station, TX 77843, USA
| | - Kerstin K Landrock
- Department of Nutrition, Texas A&M University, College Station, TX 77843, USA
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, 4466 TAMU, College Station, TX 77843-4466, USA
| | - Robert S Chapkin
- Department of Nutrition, Texas A&M University, College Station, TX 77843, USA
| | - Shoshana Eitan
- Behavioral and Cellular Neuroscience, Department of Psychological and Brain Sciences, Texas A&M University, 4235 TAMU, College Station, TX 77843, USA.
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22
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Grobben Y, den Ouden JE, Aguado C, van Altena AM, Kraneveld AD, Zaman GJR. Amino Acid-Metabolizing Enzymes in Advanced High-Grade Serous Ovarian Cancer Patients: Value of Ascites as Biomarker Source and Role for IL4I1 and IDO1. Cancers (Basel) 2023; 15:cancers15030893. [PMID: 36765849 PMCID: PMC9913486 DOI: 10.3390/cancers15030893] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/19/2023] [Accepted: 01/28/2023] [Indexed: 02/04/2023] Open
Abstract
The molecular mechanisms contributing to immune suppression in ovarian cancer are not well understood, hampering the successful application of immunotherapy. Amino acid-metabolizing enzymes are known to contribute to the immune-hostile environment of various tumors through depletion of amino acids and production of immunosuppressive metabolites. We aimed to collectively evaluate the activity of these enzymes in high-grade serous ovarian cancer patients by performing targeted metabolomics on plasma and ascites samples. Whereas no indication was found for enhanced l-arginine or l-glutamine metabolism by immunosuppressive enzymes in ovarian cancer patients, metabolism of l-tryptophan by indoleamine 2,3-dioxygenase 1 (IDO1) was significantly elevated compared to healthy controls. Moreover, high levels of l-phenylalanine- and l-tyrosine-derived metabolites associated with interleukin 4 induced 1 (IL4I1) activity were found in ovarian cancer ascites samples. While l-tryptophan is a major substrate of both IDO1 and IL4I1, only its enhanced conversion into l-kynurenine by IDO1 could be detected, despite the observed activity of IL4I1 on its other substrates. In ascites of ovarian cancer patients, metabolite levels were higher compared to those in plasma, demonstrating the value of utilizing this fluid for biomarker identification. Finally, elevated metabolism of l-phenylalanine and l-tyrosine by IL4I1 correlated with disease stage, pointing towards a potential role for IL4I1 in ovarian cancer progression.
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Affiliation(s)
| | - Judith E. den Ouden
- Radboud Institute for Health Sciences, Radboud University Medical Center, Obstetrics and Gynecology, 6525 GA Nijmegen, The Netherlands
| | - Cristina Aguado
- Laboratory of Oncology, Pangaea Oncology, Dexeus University Hospital, 08028 Barcelona, Spain
| | - Anne M. van Altena
- Radboud Institute for Health Sciences, Radboud University Medical Center, Obstetrics and Gynecology, 6525 GA Nijmegen, The Netherlands
| | - Aletta D. Kraneveld
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Guido J. R. Zaman
- Oncolines B.V., 5349 AB Oss, The Netherlands
- Correspondence: ; Tel.: +31-412-700501
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23
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Huang P, Yi S, Yu L, Tian F, Zhao J, Zhang H, Chen W, Zhai Q. Integrative analysis of the metabolome and transcriptome reveals the influence of Lactobacillus plantarum CCFM8610 on germ-free mice. Food Funct 2023; 14:388-398. [PMID: 36511852 DOI: 10.1039/d2fo03117e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study describes the influence of Lactobacillus plantarum CCFM8610 on the host by employing transcriptome and untargeted metabolomics. According to the enrichment analysis, three pathways, including the complement and coagulation cascade pathway, antigen processing and presentation pathways, and protein processing in the endoplasmic reticulum pathway, were affected by L. plantarum CCFM8610 colonization. According to partial least squares-discriminant analysis, five metabolites, L-methionine, D-tryptophan, indoleacrylic acid, DL-acetylcarnitine, and L-norleucine, were identified as key metabolites in the serum. Furthermore, integrative analysis of the metabolome and transcriptome revealed connections between enriched pathways and differential metabolites, and the regulation strategy of choline by affecting gene expression was proposed. Overall, the effects of L. plantarum CCFM8610 on host health were investigated after excluding the influence of gut microbes, which provides a valuable reference for studying the potential mechanisms of the effect of probiotics on host health.
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Affiliation(s)
- Pan Huang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Shanrong Yi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Leilei Yu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Fengwei Tian
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, Jiangsu 214122, China.,Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, China
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Qixiao Zhai
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R China. .,School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
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24
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Pracht K, Wittner J, Kagerer F, Jäck HM, Schuh W. The intestine: A highly dynamic microenvironment for IgA plasma cells. Front Immunol 2023; 14:1114348. [PMID: 36875083 PMCID: PMC9977823 DOI: 10.3389/fimmu.2023.1114348] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 01/23/2023] [Indexed: 02/18/2023] Open
Abstract
To achieve longevity, IgA plasma cells require a sophisticated anatomical microenvironment that provides cytokines, cell-cell contacts, and nutrients as well as metabolites. The intestinal epithelium harbors cells with distinct functions and represents an important defense line. Anti-microbial peptide-producing paneth cells, mucus-secreting goblet cells and antigen-transporting microfold (M) cells cooperate to build a protective barrier against pathogens. In addition, intestinal epithelial cells are instrumental in the transcytosis of IgA to the gut lumen, and support plasma cell survival by producing the cytokines APRIL and BAFF. Moreover, nutrients are sensed through specialized receptors such as the aryl hydrocarbon receptor (AhR) by both, intestinal epithelial cells and immune cells. However, the intestinal epithelium is highly dynamic with a high cellular turn-over rate and exposure to changing microbiota and nutritional factors. In this review, we discuss the spatial interplay of the intestinal epithelium with plasma cells and its potential contribution to IgA plasma cell generation, homing, and longevity. Moreover, we describe the impact of nutritional AhR ligands on intestinal epithelial cell-IgA plasma cell interaction. Finally, we introduce spatial transcriptomics as a new technology to address open questions in intestinal IgA plasma cell biology.
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Affiliation(s)
- Katharina Pracht
- Division of Molecular Immunology, Department of Internal Medicine 3, Nikolaus-Fiebiger-Center, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Jens Wittner
- Division of Molecular Immunology, Department of Internal Medicine 3, Nikolaus-Fiebiger-Center, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Fritz Kagerer
- Division of Molecular Immunology, Department of Internal Medicine 3, Nikolaus-Fiebiger-Center, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Hans-Martin Jäck
- Division of Molecular Immunology, Department of Internal Medicine 3, Nikolaus-Fiebiger-Center, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Wolfgang Schuh
- Division of Molecular Immunology, Department of Internal Medicine 3, Nikolaus-Fiebiger-Center, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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25
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Kossack ME, Manz KE, Martin NR, Pennell KD, Plavicki J. Environmentally relevant uptake, elimination, and metabolic changes following early embryonic exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin in zebrafish. CHEMOSPHERE 2023; 310:136723. [PMID: 36241106 PMCID: PMC9835613 DOI: 10.1016/j.chemosphere.2022.136723] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 08/16/2022] [Accepted: 09/30/2022] [Indexed: 06/03/2023]
Abstract
Dioxin and dioxin-like compounds are ubiquitous environmental contaminants that induce toxicity by binding to the aryl hydrocarbon receptor (AHR), a ligand activated transcription factor. The zebrafish model has been used to define the developmental toxicity observed following exposure to exogenous AHR ligands such as the potent agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin (dioxin, TCDD). While the model has successfully identified cellular targets of TCDD and molecular mechanisms mediating TCDD-induced phenotypes, fundamental information such as the body burden produced by standard exposure models is still unknown. We performed targeted gas chromatography (GC) high-resolution mass spectrometry (HRMS) in tandem with non-targeted liquid chromatography (LC) HRMS to quantify TCDD uptake, model the elimination dynamics of TCDD, and determine how TCDD exposure affects the zebrafish metabolome. We found that 50 ppt, 10 ppb, and 1 ppb waterborne exposures to TCDD during early embryogenesis produced environmentally relevant body burdens: 38 ± 4.34, 26.6 ± 1.2, and 8.53 ± 0.341 pg/embryo, respectively, at 24 hours post fertilization. TCDD exposure was associated with the dysregulation of metabolic pathways that are associated with the AHR signaling pathway as well as pathways shown to be affected in mammals following TCDD exposure. In addition, we discovered that TCDD exposure affected several metabolic pathways that are critical for brain development and function including glutamate metabolism, chondroitin sulfate biosynthesis, and tyrosine metabolism. Together, these data demonstrate that existing exposure methods produce environmentally relevant body burdens of TCDD in zebrafish and provide insight into the biochemical pathways impacted by toxicant-induced AHR activation.
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Affiliation(s)
- Michelle E Kossack
- Department of Pathology and Laboratory Medicine, Brown University, 70 Ship St, Providence, RI, 02903, USA
| | - Katherine E Manz
- School of Engineering, Brown University, 184 Hope St, Box D, Providence, RI, 02903, USA
| | - Nathan R Martin
- Department of Pathology and Laboratory Medicine, Brown University, 70 Ship St, Providence, RI, 02903, USA
| | - Kurt D Pennell
- School of Engineering, Brown University, 184 Hope St, Box D, Providence, RI, 02903, USA
| | - Jessica Plavicki
- Department of Pathology and Laboratory Medicine, Brown University, 70 Ship St, Providence, RI, 02903, USA.
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26
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An overview of aryl hydrocarbon receptor ligands in the Last two decades (2002–2022): A medicinal chemistry perspective. Eur J Med Chem 2022; 244:114845. [DOI: 10.1016/j.ejmech.2022.114845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/28/2022] [Accepted: 10/08/2022] [Indexed: 11/21/2022]
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27
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Wu J, Pang T, Lin Z, Zhao M, Jin H. The key player in the pathogenesis of environmental influence of systemic lupus erythematosus: Aryl hydrocarbon receptor. Front Immunol 2022; 13:965941. [PMID: 36110860 PMCID: PMC9468923 DOI: 10.3389/fimmu.2022.965941] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/01/2022] [Indexed: 11/28/2022] Open
Abstract
The aryl hydrocarbon receptor was previously known as an environmental receptor that modulates the cellular response to external environmental changes. In essence, the aryl hydrocarbon receptor is a cytoplasmic receptor and transcription factor that is activated by binding to the corresponding ligands, and they transmit relevant information by binding to DNA, thereby activating the transcription of various genes. Therefore, we can understand the development of certain diseases and discover new therapeutic targets by studying the regulation and function of AhR. Several autoimmune diseases, including systemic lupus erythematosus (SLE), have been connected to AhR in previous studies. SLE is a classic autoimmune disease characterized by multi-organ damage and disruption of immune tolerance. We discuss here the homeostatic regulation of AhR and its ligands among various types of immune cells, pathophysiological roles, in addition to the roles of various related cytokines and signaling pathways in the occurrence and development of SLE.
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28
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Goya-Jorge E, Gonza I, Bondue P, Douny C, Taminiau B, Daube G, Scippo ML, Delcenserie V. Human Adult Microbiota in a Static Colon Model: AhR Transcriptional Activity at the Crossroads of Host–Microbe Interaction. Foods 2022; 11:foods11131946. [PMID: 35804761 PMCID: PMC9265634 DOI: 10.3390/foods11131946] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 02/01/2023] Open
Abstract
Functional symbiotic intestinal microbiota regulates immune defense and the metabolic processing of xenobiotics in the host. The aryl hydrocarbon receptor (AhR) is one of the transcription factors mediating host–microbe interaction. An in vitro static simulation of the human colon was used in this work to analyze the evolution of bacterial populations, the microbial metabolic output, and the potential induction of AhR transcriptional activity in healthy gut ecosystems. Fifteen target taxa were explored by qPCR, and the metabolic content was chromatographically profiled using SPME-GC-MS and UPLC-FLD to quantify short-chain fatty acids (SCFA) and biogenic amines, respectively. Over 72 h of fermentation, the microbiota and most produced metabolites remained stable. Fermentation supernatant induced AhR transcription in two of the three reporter gene cell lines (T47D, HepG2, HT29) evaluated. Mammary and intestinal cells were more sensitive to microbiota metabolic production, which showed greater AhR agonism than the 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) used as a positive control. Some of the SCFA and biogenic amines identified could crucially contribute to the potent AhR induction of the fermentation products. As a fundamental pathway mediating human intestinal homeostasis and as a sensor for several microbial metabolites, AhR activation might be a useful endpoint to include in studies of the gut microbiota.
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Affiliation(s)
- Elizabeth Goya-Jorge
- Laboratory of Food Quality Management, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 10 (B43b), 4000 Liege, Belgium; (E.G.-J.); (I.G.)
| | - Irma Gonza
- Laboratory of Food Quality Management, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 10 (B43b), 4000 Liege, Belgium; (E.G.-J.); (I.G.)
| | - Pauline Bondue
- Research & Development, ORTIS S.A., Hinter der Heck 46, 4750 Elsenborn, Belgium;
| | - Caroline Douny
- Laboratory of Food Analysis, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 10 (B43b), 4000 Liege, Belgium; (C.D.); (M.-L.S.)
| | - Bernard Taminiau
- Laboratory of Microbiology, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 180 (B42), 4000 Liege, Belgium; (B.T.); (G.D.)
| | - Georges Daube
- Laboratory of Microbiology, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 180 (B42), 4000 Liege, Belgium; (B.T.); (G.D.)
| | - Marie-Louise Scippo
- Laboratory of Food Analysis, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 10 (B43b), 4000 Liege, Belgium; (C.D.); (M.-L.S.)
| | - Véronique Delcenserie
- Laboratory of Food Quality Management, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liege, Av. de Cureghem 10 (B43b), 4000 Liege, Belgium; (E.G.-J.); (I.G.)
- Correspondence: ; Tel.: +32-4-366-51-24
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29
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Lee JH, Park JH. Host-microbial interactions in metabolic diseases: from diet to immunity. JOURNAL OF MICROBIOLOGY (SEOUL, KOREA) 2022; 60:561-575. [PMID: 35511325 DOI: 10.1007/s12275-022-2087-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/23/2022] [Accepted: 04/01/2022] [Indexed: 12/14/2022]
Abstract
Growing evidence suggests that the gut microbiome is an important contributor to metabolic diseases. Alterations in microbial communities are associated with changes in lipid metabolism, glucose homeostasis, intestinal barrier functions, and chronic inflammation, all of which can lead to metabolic disorders. Therefore, the gut microbiome may represent a novel therapeutic target for obesity, type 2 diabetes, and nonalcoholic fatty liver disease. This review discusses how gut microbes and their products affect metabolic diseases and outlines potential treatment approaches via manipulation of the gut microbiome. Increasing our understanding of the interactions between the gut microbiome and host metabolism may help restore the healthy symbiotic relationship between them.
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Affiliation(s)
- Ju-Hyung Lee
- School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Joo-Hong Park
- School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul, 08826, Republic of Korea.
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30
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Yu HX, Feng Z, Lin W, Yang K, Liu RQ, Li JQ, Liu XY, Pei M, Yang HT. Ongoing Clinical Trials in Aging-Related Tissue Fibrosis and New Findings Related to AhR Pathways. Aging Dis 2022; 13:732-752. [PMID: 35656117 PMCID: PMC9116921 DOI: 10.14336/ad.2021.1105] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/05/2021] [Indexed: 11/06/2022] Open
Abstract
Fibrosis is a pathological manifestation of wound healing that replaces dead/damaged tissue with collagen-rich scar tissue to maintain homeostasis, and complications from fibrosis contribute to nearly half of all deaths in the industrialized world. Ageing is closely associated with a progressive decline in organ function, and the prevalence of tissue fibrosis dramatically increases with age. Despite the heavy clinical and economic burden of organ fibrosis as the population ages, to date, there is a paucity of therapeutic strategies that are specifically designed to slow fibrosis. Aryl hydrocarbon receptor (AhR) is an environment-sensing transcription factor that exacerbates aging phenotypes in different tissues that has been brought back into the spotlight again with economic development since AhR could interact with persistent organic pollutants derived from incomplete waste combustion. In addition, gut microbiota dysbiosis plays a pivotal role in the pathogenesis of numerous diseases, and microbiota-associated tryptophan metabolites are dedicated contributors to fibrogenesis by acting as AhR ligands. Therefore, a better understanding of the effects of tryptophan metabolites on fibrosis modulation through AhR may facilitate the exploitation of new therapeutic avenues for patients with organ fibrosis. In this review, we primarily focus on how tryptophan-derived metabolites are involved in renal fibrosis, idiopathic pulmonary fibrosis, hepatic fibrosis and cardiac fibrosis. Moreover, a series of ongoing clinical trials are highlighted.
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Affiliation(s)
- Hang-Xing Yu
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Zhe Feng
- 3Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Wei Lin
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Kang Yang
- 4Kidney Disease Treatment Center, The first affiliated hospital of Henan university of CM, Zhengzhou, Henan, China
| | - Rui-Qi Liu
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Jia-Qi Li
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Xin-Yue Liu
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Ming Pei
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
| | - Hong-Tao Yang
- 1Department of Nephrology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.,2National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin, China
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31
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Toydemir G. Screening of the AhR- and Nrf2-linked transcriptional activities of some cruciferous vegetables and nuts in human intestinal epithelial cells as foods containing endogenous AhR ligand precursors. FOOD BIOTECHNOL 2022. [DOI: 10.1080/08905436.2022.2028263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Gamze Toydemir
- Department of Food Engineering, Faculty of Engineering, Alanya Alaaddin Keykubat University, Antalya, Turkey
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32
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Shandell MA, Capatina AL, Lawrence SM, Brackenbury WJ, Lagos D. Inhibition of the Na +/K +-ATPase by cardiac glycosides suppresses expression of the IDO1 immune checkpoint in cancer cells by reducing STAT1 activation. J Biol Chem 2022; 298:101707. [PMID: 35150740 PMCID: PMC8902613 DOI: 10.1016/j.jbc.2022.101707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 12/18/2022] Open
Abstract
Despite extensive basic and clinical research on immune checkpoint regulatory pathways, little is known about the effects of the ionic tumor microenvironment on immune checkpoint expression and function. Here we describe a mechanistic link between Na+/K+-ATPase (NKA) inhibition and activity of the immune checkpoint protein indoleamine-pyrrole 2',3'-dioxygenase 1 (IDO1). We found that IDO1 was necessary and sufficient for production of kynurenine, a downstream tryptophan metabolite, in cancer cells. We developed a spectrophotometric assay to screen a library of 31 model ion transport-targeting compounds for potential effects on IDO1 function in A549 lung and MDA-MB-231 breast cancer cells. This revealed that the cardiac glycosides ouabain and digoxin inhibited kynurenine production at concentrations that did not affect cell survival. NKA inhibition by ouabain and digoxin resulted in increased intracellular Na+ levels and downregulation of IDO1 mRNA and protein levels, which was consistent with the reduction in kynurenine levels. Knockdown of ATP1A1, the ɑ1 subunit of the NKA and target of cardiac glycosides, increased Na+ levels to a lesser extent than cardiac glycoside treatment and did not affect IDO1 expression. However, ATP1A1 knockdown significantly enhanced the effect of cardiac glycosides on IDO1 expression and kynurenine production. Mechanistically, we show that cardiac glycoside treatment resulted in curtailing the length of phosphorylation-mediated stabilization of STAT1, a transcriptional regulator of IDO1 expression, an effect enhanced by ATP1A1 knockdown. Our findings reveal cross talk between ionic modulation via cardiac glycosides and immune checkpoint protein expression in cancer cells with broad mechanistic and clinical implications.
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Affiliation(s)
- Mia A Shandell
- Department of Biology, University of York, York, United Kingdom; Hull York Medical School, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | - Alina L Capatina
- Department of Biology, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | | | - William J Brackenbury
- Department of Biology, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom
| | - Dimitris Lagos
- Hull York Medical School, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom.
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33
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Aryl Hydrocarbon Receptor Activation by Benzo[ a]pyrene Prevents Development of Septic Shock and Fatal Outcome in a Mouse Model of Systemic Salmonella enterica Infection. Cells 2022; 11:cells11040737. [PMID: 35203386 PMCID: PMC8870598 DOI: 10.3390/cells11040737] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 02/04/2023] Open
Abstract
This study focused on immunomodulatory effects of aryl hydrocarbon receptor (AhR) activation through benzo[a]pyrene (BaP) during systemic bacterial infection. Using a well-established mouse model of systemic Salmonella enterica (S.E.) infection, we studied the influence of BaP on the cellular and humoral immune response and the outcome of disease. BaP exposure significantly reduced mortality, which is mainly caused by septic shock. Surprisingly, the bacterial burden in BaP-exposed surviving mice was significantly higher compared to non-exposed mice. During the early phase of infection (days 1-3 post-infection (p.i.)), the transcription of proinflammatory factors (i.e., IL-12, IFN-γ, TNF-α, IL-1β, IL-6, IL-18) was induced faster under BaP exposure. Moreover, BaP supported the activity of antigen-presenting cells (i.e., CD64 (FcγRI), MHC II, NO radicals, phagocytosis) at the site of infection. However, early in infection, the anti-inflammatory cytokines IL-10 and IL-22 were also locally and systemically upregulated in BaP-exposed S.E.-infected mice. BaP-exposure resulted in long-term persistence of salmonellae up to day 90 p.i., which was accompanied by significantly elevated S.E.-specific antibody responses (i.e., IgG1, IgG2c). In summary, these data suggest that BaP-induced AhR activation is capable of preventing a fatal outcome of systemic S.E. infection, but may result in long-term bacterial persistence, which, in turn, may support the development of chronic inflammation.
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34
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Hu W, Huang L, Zhou Z, Yin L, Tang J. Diallyl Disulfide (DADS) Ameliorates Intestinal Candida albicans Infection by Modulating the Gut microbiota and Metabolites and Providing Intestinal Protection in Mice. Front Cell Infect Microbiol 2022; 11:743454. [PMID: 35071031 PMCID: PMC8777027 DOI: 10.3389/fcimb.2021.743454] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 12/13/2021] [Indexed: 12/12/2022] Open
Abstract
Diallyl disulfide (DADS), a garlic extract also known as allicin, has been reported to have numerous biological activities, including anticancer, antifungal, and inflammation-inhibiting activities, among others. Although many studies have assessed whether DADS can treat Candida albicans infection in vitro, its in vivo function and the underlying mechanism are still not clear. Accumulated evidence has implicated the gut microbiota as an important factor in the colonization and invasion of C. albicans. Thus, this study aimed to identify the mechanism by which DADS ameliorates dextran sulfate (DSS)-induced intestinal C. albicans infection based on the systematic analysis of the gut microbiota and metabolomics in mice. Here, we determined the body weight, survival, colon length, histological score, and inflammatory cytokine levels in the serum and intestines of experimental mice. Fecal samples were collected for gut microbiota and metabolite analysis by 16S rRNA gene sequencing and LC-MS metabolomics, respectively. DADS significantly alleviated DSS-induced intestinal C. albicans infection and altered the gut microbial community structure and metabolic profile in the mice. The abundances of some pathogenic bacteria, such as Proteobacteria, Escherichia-Shigella, and Streptococcus, were notably decreased after treatment with DADS. In contrast, SCFA-producing bacteria, namely, Ruminiclostridium, Oscillibacter, and Ruminococcaceae_UCG-013, greatly increased in number. The perturbance of metabolites in infectious mice was improved by DADS, with increases in secondary bile acids, arachidonic acid, indoles and their derivatives, which were highly related to the multiple differentially altered metabolic pathways, namely, bile secretion, arachidonic acid metabolism, and tryptophan metabolism. This study indicated that DADS could modulate gut microbiota and metabolites and protect the gut barrier to alleviate DSS-induced intestinal C. albicans infection in mice. Moreover, this work might also provide novel insight into the treatment of C. albicans infection using DADS.
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Affiliation(s)
| | | | | | | | - Jianguo Tang
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
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35
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Abstract
The gut microbiome produces chemically diverse small molecules to interact with the host, conveying signals from the gut to the whole system. The microbial metabolites feature several unique modes of interaction with host targets, which fits well into the balanced and networked fashion of biological regulation. Hence, fully unveiling the targetome of signaling microbial metabolites may offer new insights into host health and disease, expand the repertoire of druggable targets, and enlighten a bioinspired path to drug design and discovery. In this review, we present an updated understanding of how microbial metabolite interaction with host targets finely orchestrates and integrates multiple signals to pathophysiological phenotypes, contributing new insights into organ crosstalk and holistic homeostasis maintenance in biological systems. We discuss strategies and open questions for mining and biomimicking the microbial metabolite-targetome interactions for pharmacological manipulation, which may lead to a new paradigm of drug discovery.
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Affiliation(s)
- Xiao Zheng
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaoying Cai
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Haiping Hao
- State Key Laboratory of Natural Medicines, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
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Park J, Kim CH. Regulation of common neurological disorders by gut microbial metabolites. Exp Mol Med 2021; 53:1821-1833. [PMID: 34857900 PMCID: PMC8741890 DOI: 10.1038/s12276-021-00703-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/06/2021] [Accepted: 09/23/2021] [Indexed: 12/13/2022] Open
Abstract
The gut is connected to the CNS by immunological mediators, lymphocytes, neurotransmitters, microbes and microbial metabolites. A mounting body of evidence indicates that the microbiome exerts significant effects on immune cells and CNS cells. These effects frequently result in the suppression or exacerbation of inflammatory responses, the latter of which can lead to severe tissue damage, altered synapse formation and disrupted maintenance of the CNS. Herein, we review recent progress in research on the microbial regulation of CNS diseases with a focus on major gut microbial metabolites, such as short-chain fatty acids, tryptophan metabolites, and secondary bile acids. Pathological changes in the CNS are associated with dysbiosis and altered levels of microbial metabolites, which can further exacerbate various neurological disorders. The cellular and molecular mechanisms by which these gut microbial metabolites regulate inflammatory diseases in the CNS are discussed. We highlight the similarities and differences in the impact on four major CNS diseases, i.e., multiple sclerosis, Parkinson's disease, Alzheimer's disease, and autism spectrum disorder, to identify common cellular and molecular networks governing the regulation of cellular constituents and pathogenesis in the CNS by microbial metabolites.
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Affiliation(s)
- Jeongho Park
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Chang H Kim
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, 48109, USA.
- Mary H. Weiser Food Allergy Center, Center for Gastrointestinal Research, and Rogel Center for Cancer Research, University of Michigan School of Medicine, Ann Arbor, MI, 48109, USA.
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Vazquez-Rivera E, Rojas B, Parrott JC, Shen AL, Xing Y, Carney PR, Bradfield CA. The aryl hydrocarbon receptor as a model PAS sensor. Toxicol Rep 2021; 9:1-11. [PMID: 34950569 PMCID: PMC8671103 DOI: 10.1016/j.toxrep.2021.11.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 01/02/2023] Open
Abstract
Proteins containing PER-ARNT-SIM (PAS) domains are commonly associated with environmental adaptation in a variety of organisms. The PAS domain is found in proteins throughout Archaea, Bacteria, and Eukarya and often binds small-molecules, supports protein-protein interactions, and transduces input signals to mediate an adaptive physiological response. Signaling events mediated by PAS sensors can occur through induced phosphorelays or genomic events that are often dependent upon PAS domain interactions. In this perspective, we briefly discuss the diversity of PAS domain containing proteins, with particular emphasis on the prototype member, the aryl hydrocarbon receptor (AHR). This ligand-activated transcription factor acts as a sensor of the chemical environment in humans and many chordates. We conclude with the idea that since mammalian PAS proteins often act through PAS-PAS dimers, undocumented interactions of this type may link biological processes that we currently think of as independent. To support this idea, we present a framework to guide future experiments aimed at fully elucidating the spectrum of PAS-PAS interactions with an eye towards understanding how they might influence environmental sensing in human and wildlife populations.
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Affiliation(s)
- Emmanuel Vazquez-Rivera
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Brenda Rojas
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Jessica C. Parrott
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Anna L. Shen
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Yongna Xing
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Patrick R. Carney
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Christopher A. Bradfield
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
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Gut Microbial Metabolite-Mediated Regulation of the Intestinal Barrier in the Pathogenesis of Inflammatory Bowel Disease. Nutrients 2021; 13:nu13124259. [PMID: 34959809 PMCID: PMC8704337 DOI: 10.3390/nu13124259] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 12/14/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic inflammatory disease. The disease has a multifactorial aetiology, involving genetic, microbial as well as environmental factors. The disease pathogenesis operates at the host-microbe interface in the gut. The intestinal epithelium plays a central role in IBD disease pathogenesis. Apart from being a physical barrier, the epithelium acts as a node that integrates environmental, dietary, and microbial cues to calibrate host immune response and maintain homeostasis in the gut. IBD patients display microbial dysbiosis in the gut, combined with an increased barrier permeability that contributes to disease pathogenesis. Metabolites produced by microbes in the gut are dynamic indicators of diet, host, and microbial interplay in the gut. Microbial metabolites are actively absorbed or diffused across the intestinal lining to affect the host response in the intestine as well as at systemic sites via the engagement of cognate receptors. In this review, we summarize insights from metabolomics studies, uncovering the dynamic changes in gut metabolite profiles in IBD and their importance as potential diagnostic and prognostic biomarkers of disease. We focus on gut microbial metabolites as key regulators of the intestinal barrier and their role in the pathogenesis of IBD.
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Fernández-Gallego N, Sánchez-Madrid F, Cibrian D. Role of AHR Ligands in Skin Homeostasis and Cutaneous Inflammation. Cells 2021; 10:cells10113176. [PMID: 34831399 PMCID: PMC8622815 DOI: 10.3390/cells10113176] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/09/2021] [Accepted: 11/12/2021] [Indexed: 02/07/2023] Open
Abstract
Aryl hydrocarbon receptor (AHR) is an important regulator of skin barrier function. It also controls immune-mediated skin responses. The AHR modulates various physiological functions by acting as a sensor that mediates environment–cell interactions, particularly during immune and inflammatory responses. Diverse experimental systems have been used to assess the AHR’s role in skin inflammation, including in vitro assays of keratinocyte stimulation and murine models of psoriasis and atopic dermatitis. Similar approaches have addressed the role of AHR ligands, e.g., TCDD, FICZ, and microbiota-derived metabolites, in skin homeostasis and pathology. Tapinarof is a novel AHR-modulating agent that inhibits skin inflammation and enhances skin barrier function. The topical application of tapinarof is being evaluated in clinical trials to treat psoriasis and atopic dermatitis. In the present review, we summarize the effects of natural and synthetic AHR ligands in keratinocytes and inflammatory cells, and their relevance in normal skin homeostasis and cutaneous inflammatory diseases.
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Affiliation(s)
- Nieves Fernández-Gallego
- Immunology Service, Hospital Universitario de la Princesa, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa (IIS-IP), 28006 Madrid, Spain;
- Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Francisco Sánchez-Madrid
- Immunology Service, Hospital Universitario de la Princesa, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa (IIS-IP), 28006 Madrid, Spain;
- Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence: (F.S.-M.); (D.C.)
| | - Danay Cibrian
- Immunology Service, Hospital Universitario de la Princesa, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa (IIS-IP), 28006 Madrid, Spain;
- Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
- CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence: (F.S.-M.); (D.C.)
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Toxic Effects of Indoxyl Sulfate on Osteoclastogenesis and Osteoblastogenesis. Int J Mol Sci 2021; 22:ijms222011265. [PMID: 34681927 PMCID: PMC8538618 DOI: 10.3390/ijms222011265] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/17/2021] [Accepted: 10/18/2021] [Indexed: 02/07/2023] Open
Abstract
Uremic toxins, such as indoxyl sulfate (IS) and kynurenine, accumulate in the blood in the event of kidney failure and contribute to further bone damage. To maintain the homeostasis of the skeletal system, bone remodeling is a persistent process of bone formation and bone resorption that depends on a dynamic balance of osteoblasts and osteoclasts. The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that regulates the toxic effects of uremic toxins. IS is an endogenous AhR ligand and is metabolized from tryptophan. In osteoclastogenesis, IS affects the expression of the osteoclast precursor nuclear factor of activated T cells, cytoplasmic 1 (NFATc1) through AhR signaling. It is possible to increase osteoclast differentiation with short-term and low-dose IS exposure and to decrease differentiation with long-term and/or high-dose IS exposure. Coincidentally, during osteoblastogenesis, through the AhR signaling pathway, IS inhibits the phosphorylation of ERK, and p38 reduces the expression of the transcription factor 2 (Runx2), disturbing osteoblastogenesis. The AhR antagonist resveratrol has a protective effect on the IS/AhR pathway. Therefore, it is necessary to understand the multifaceted role of AhR in CKD, as knowledge of these transcription signals could provide a safe and effective method to prevent and treat CKD mineral bone disease.
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Miao H, Wu XQ, Wang YN, Chen DQ, Chen L, Vaziri ND, Zhuang S, Guo Y, Su W, Ma SX, Zhang HQ, Shang YQ, Yu XY, Zhao YL, Mao JR, Gao M, Zhang JH, Zhao J, Zhang Y, Zhang L, Zhao YY, Cao G. 1-Hydroxypyrene mediates renal fibrosis through aryl hydrocarbon receptor signalling pathway. Br J Pharmacol 2021; 179:103-124. [PMID: 34625952 DOI: 10.1111/bph.15705] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 09/08/2021] [Accepted: 09/13/2021] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND AND PURPOSE In chronic kidney disease (CKD), patients inevitably reach end-stage renal disease and require renal transplant. Evidence suggests that CKD is associated with metabolite disorders. However, the molecular pathways targeted by metabolites remain enigmatic. Here, we describe roles of 1-hydroxypyrene in mediating renal fibrosis. EXPERIMENTAL APPROACH We analysed 5406 urine and serum samples from patients with Stage 1-5 CKD using metabolomics, and 1-hydroxypyrene was identified and validated using longitudinal and drug intervention cohorts as well as 5/6 nephrectomised and adenine-induced rats. KEY RESULTS We identified correlations between the urine and serum levels of 1-hydroxypyrene and the estimated GFR in patients with CKD onset and progression. Moreover, increased 1-hydroxypyrene levels in serum and kidney tissues correlated with decreased renal function in two rat models. Up-regulated mRNA expression of aryl hydrocarbon receptor and its target genes, including CYP1A1, CYP1A2 and CYP1B1, were observed in patients and rats with progressive CKD. Further we showed up-regulated mRNA expression of aryl hydrocarbon receptor and its three target genes, plus up-regulated nuclear aryl hydrocarbon receptor protein levels in mice and HK-2 cells treated with 1-hydroxypyrene, which caused accumulation of extracellular matrix components. Treatment with aryl hydrocarbon receptor short hairpin RNA or flavonoids inhibited mRNA expression of aryl hydrocarbon receptor and its target genes in 1-hydroxypyrene-induced HK-2 cells and mice. CONCLUSION AND IMPLICATIONS Metabolite 1-hydroxypyrene was demonstrated to mediate renal fibrosis through activation of the aryl hydrocarbon receptor signalling pathway. Targeting aryl hydrocarbon receptor may be an alternative therapeutic strategy for CKD progression.
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Affiliation(s)
- Hua Miao
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Xia-Qing Wu
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Yan-Ni Wang
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Dan-Qian Chen
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Lin Chen
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Nosratola D Vaziri
- Division of Nephrology and Hypertension, School of Medicine, University of California Irvine, Irvine, California, USA
| | - Shougang Zhuang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Rhode Island Hospital and Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - Yan Guo
- Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico, USA
| | - Wei Su
- Department of Nephrology, Baoji Central Hospital, Baoji, China
| | - Shi-Xing Ma
- Department of Nephrology, Baoji Central Hospital, Baoji, China
| | - Huan-Qiao Zhang
- Department of Nephrology, Baoji Central Hospital, Baoji, China
| | - You-Quan Shang
- Department of Nephrology, Baoji Central Hospital, Baoji, China
| | - Xiao-Yong Yu
- Department of Nephrology, Shaanxi Traditional Chinese Medicine Hospital, Xi'an, China
| | - Yan-Long Zhao
- Department of Nephrology, Shaanxi Traditional Chinese Medicine Hospital, Xi'an, China
| | - Jia-Rong Mao
- Department of Nephrology, Shaanxi Traditional Chinese Medicine Hospital, Xi'an, China
| | - Ming Gao
- Department of Nephrology, Xi'an No. 4 Hospital, Xi'an, China
| | - Jin-Hua Zhang
- Department of Nephrology, Xi'an No. 4 Hospital, Xi'an, China
| | - Jin Zhao
- Department of Nephrology, Xi'an No. 4 Hospital, Xi'an, China
| | - Yuan Zhang
- Department of Nephrology, Xi'an No. 4 Hospital, Xi'an, China
| | - Li Zhang
- Department of Nephrology, Xi'an No. 4 Hospital, Xi'an, China
| | - Ying-Yong Zhao
- Faculty of Life Science and Medicine, Northwest University, Xi'an, China
| | - Gang Cao
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, China
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Walter K, Grosskopf H, Karkossa I, von Bergen M, Schubert K. Proteomic Characterization of the Cellular Effects of AhR Activation by Microbial Tryptophan Catabolites in Endotoxin-Activated Human Macrophages. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph181910336. [PMID: 34639632 PMCID: PMC8507890 DOI: 10.3390/ijerph181910336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/17/2021] [Accepted: 09/24/2021] [Indexed: 01/22/2023]
Abstract
Sensing microbial tryptophan catabolites by the aryl hydrocarbon receptor (AhR) plays a pivotal role in host-microbiome homeostasis by modulating the host immune response. Nevertheless, the involved cellular processes triggered by the metabolites are mainly unknown. Here, we analyzed proteomic changes in macrophages after treatment with the tryptophan metabolites indole-3-acetic acid (I3AA) or indole-3-aldehyde (IAld), as well as the prototypic exogenous AhR-ligand benzo(a)pyrene (BaP) in the absence and presence of lipopolysaccharide (LPS) to identify affected cellular processes and pathways. The AhR-ligands regulated metabolic and immunologic processes in dependency of LPS co-stimulation. All investigated ligands time-dependently enhanced fatty acid β-oxidation. Differences due to the combination with LPS were observed for all three ligands. Additionally, oxidative phosphorylation was significantly increased by IAld and I3AA in a time and LPS-dependent manner. Immunoregulatory processes were affected in distinct ways. While BaP and I3AA up-regulated IL-8 signaling, IL-6 signaling was decreased by IAld. BaP decreased the inflammasome pathway. Thus, AhR-ligand-dependent regulations were identified, which may modulate the response of macrophages to bacterial infections, but also the commensal microbiota through changes in immune cell signaling and metabolic pathways that may also alter functionality. These findings highlight the relevance of AhR for maintaining microbial homeostasis and, consequently, host health.
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Affiliation(s)
- Katharina Walter
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; (K.W.); (H.G.); (I.K.); (M.v.B.)
| | - Henning Grosskopf
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; (K.W.); (H.G.); (I.K.); (M.v.B.)
| | - Isabel Karkossa
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; (K.W.); (H.G.); (I.K.); (M.v.B.)
| | - Martin von Bergen
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; (K.W.); (H.G.); (I.K.); (M.v.B.)
- Institute of Biochemistry, Leipzig University, 04318 Leipzig, Germany
| | - Kristin Schubert
- Department of Molecular Systems Biology, Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; (K.W.); (H.G.); (I.K.); (M.v.B.)
- Correspondence:
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Larigot L, Benoit L, Koual M, Tomkiewicz C, Barouki R, Coumoul X. Aryl Hydrocarbon Receptor and Its Diverse Ligands and Functions: An Exposome Receptor. Annu Rev Pharmacol Toxicol 2021; 62:383-404. [PMID: 34499523 DOI: 10.1146/annurev-pharmtox-052220-115707] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The aryl hydrocarbon receptor (AhR) is a transcriptional factor that regulates multiple functions following its activation by a variety of ligands, including xenobiotics, natural products, microbiome metabolites, and endogenous molecules. Because of this diversity, the AhR constitutes an exposome receptor. One of its main functions is to regulate several lines of defense against chemical insults and bacterial infections. Indeed, in addition to its well-established detoxication function, it has several functions at physiological barriers, and it plays a critical role in immunomodulation. The AhR is also involved in the development of several organs and their homeostatic maintenance. Its activity depends on the type of ligand and on the time frame of the receptor activation, which can be either sustained or transient, leading in some cases to opposite modes of regulations as illustrated in the regulation of different cancer pathways. The development of selective modulators and their pharmacological characterization are important areas of research. Expected final online publication date for the Annual Review of Pharmacology and Toxicology, Volume 62 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Lucie Larigot
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France;
| | - Louise Benoit
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France; .,Service de Chirurgie Cancérologique Gynécologique et du Sein, Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges-Pompidou, 75015 Paris, France
| | - Meriem Koual
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France; .,Service de Chirurgie Cancérologique Gynécologique et du Sein, Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges-Pompidou, 75015 Paris, France
| | - Céline Tomkiewicz
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France;
| | - Robert Barouki
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France; .,Service de Chirurgie Cancérologique Gynécologique et du Sein, Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges-Pompidou, 75015 Paris, France
| | - Xavier Coumoul
- INSERM UMR-S1124, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, and Université de Paris, 75006 Paris, France;
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El-Ghiaty MA, El-Kadi AO. Arsenic: Various species with different effects on cytochrome P450 regulation in humans. EXCLI JOURNAL 2021; 20:1184-1242. [PMID: 34512225 PMCID: PMC8419240 DOI: 10.17179/excli2021-3890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/02/2021] [Indexed: 11/22/2022]
Abstract
Arsenic is well-recognized as one of the most hazardous elements which is characterized by its omnipresence throughout the environment in various chemical forms. From the simple inorganic arsenite (iAsIII) and arsenate (iAsV) molecules, a multitude of more complex organic species are biologically produced through a process of metabolic transformation with biomethylation being the core of this process. Because of their differential toxicity, speciation of arsenic-based compounds is necessary for assessing health risks posed by exposure to individual species or co-exposure to several species. In this regard, exposure assessment is another pivotal factor that includes identification of the potential sources as well as routes of exposure. Identification of arsenic impact on different physiological organ systems, through understanding its behavior in the human body that leads to homeostatic derangements, is the key for developing strategies to mitigate its toxicity. Metabolic machinery is one of the sophisticated body systems targeted by arsenic. The prominent role of cytochrome P450 enzymes (CYPs) in the metabolism of both endobiotics and xenobiotics necessitates paying a great deal of attention to the possible effects of arsenic compounds on this superfamily of enzymes. Here we highlight the toxicologically relevant arsenic species with a detailed description of the different environmental sources as well as the possible routes of human exposure to these species. We also summarize the reported findings of experimental investigations evaluating the influence of various arsenicals on different members of CYP superfamily using human-based models.
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Affiliation(s)
- Mahmoud A. El-Ghiaty
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Ayman O.S. El-Kadi
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
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45
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Kumar P, Lee JH, Lee J. Diverse roles of microbial indole compounds in eukaryotic systems. Biol Rev Camb Philos Soc 2021; 96:2522-2545. [PMID: 34137156 PMCID: PMC9290978 DOI: 10.1111/brv.12765] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 02/06/2023]
Abstract
Indole and its derivatives are widespread across different life forms, functioning as signalling molecules in prokaryotes and with more diverse roles in eukaryotes. A majority of indoles found in the environment are attributed to bacterial enzymes converting tryptophan into indole and its derivatives. The involvement of indoles among lower organisms as an interspecies and intraspecies signal is well known, with many reports showing that inter‐kingdom interactions involving microbial indole compounds are equally important as they influence defence systems and even the behaviour of higher organisms. This review summarizes recent advances in our understanding of the functional properties of indole and indole derivatives in diverse eukaryotes. Furthermore, we discuss current perspectives on the role of microbial indoles in human diseases such as diabetes, obesity, atherosclerosis, and cancers. Deciphering the function of indoles as biomarkers of metabolic state will facilitate the formulation of diet‐based treatments and open unique therapeutic opportunities.
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Affiliation(s)
- Prasun Kumar
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Jin-Hyung Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
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L-Tryptophan activates the aryl hydrocarbon receptor and induces cell cycle arrest in porcine trophectoderm cells. Theriogenology 2021; 171:137-146. [PMID: 34058506 DOI: 10.1016/j.theriogenology.2021.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 12/21/2022]
Abstract
During implantation, the proliferation of trophectoderm cells (the outer epithelium of blastocysts) is related to conceptus elongation and placenta formation. Tryptophan (Trp) is a key regulator of embryogenesis and embryonic implantation during pregnancy. We sought to determine whether different concentrations of Trp alters porcine trophectoderm (pTr) cell proliferation. pTr cells were cultured in medium containing 40, 500, or 1000 μM Trp. The cell proliferation rate and the progression of the cells through the cell cycle were determined. To identify differentially expressed genes (DEGs) in the pTr cells, we compared mRNA transcriptomes by RNA-Seq after cell treatment with different concentrations of Trp. Some candidate DEGs were identified by quantitative reverse transcription PCR (qPCR). High L-Trp levels (500 and 1000 μM) inhibited cell proliferation and induced cell cycle arrest. We identified 19 DEGs between the 500 μM L-Trp and 40 μM L-Trp groups and 168 DEGs between the 1000 μM L-Trp and 40 μM L-Trp groups and subsequently used qPCR to validate some genes that were upregulated or downregulated. The functional gene networks in which the DEGs were most enriched included those associated with regulating DNA replication and the cell cycle, and the majority of the DEGs in both of these functional pathways was downregulated. The results showed that the addition of 500 and 1000 μM Trp significantly increased the abundance of proteins in the Aryl Hydrocarbon Receptor (AHR) signaling pathway. Collectively, these results indicate a novel and important role for Trp in mediating the proliferation of porcine placental cells largely via the AHR signaling pathway. Additionally, these findings help to explain the side effects of excessive Trp supplementation on placenta development and embryo growth in mammals.
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Kynurenine induces an age-related phenotype in bone marrow stromal cells. Mech Ageing Dev 2021; 195:111464. [PMID: 33631183 DOI: 10.1016/j.mad.2021.111464] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/08/2021] [Accepted: 02/21/2021] [Indexed: 01/02/2023]
Abstract
Advanced age is one of the important contributing factors for musculoskeletal deterioration. Although the exact mechanism behind this degeneration is unknown, it has been previously established that nutritional signaling plays a vital role in musculoskeletal pathophysiology. Our group established the vital role of the essential amino acid, tryptophan, in aging musculoskeletal health. With advanced age, inflammatory factors activate indoleamine 2,3-dioxygenase (IDO1) and accumulate excessive intermediate tryptophan metabolites such as Kynurenine (KYN). With age, Kynurenine accumulates and suppresses osteogenic differentiation, impairs autophagy, promotes early senescence, and alters cellular bioenergetics of bone marrow stem cells. Recent studies have shown that Kynurenine negatively impacts bone marrow stromal cells (BMSCs) and, consequently, promotes bone loss. Overall, understanding the mechanism behind BMSCs losing their ability for osteogenic differentiation can provide insight into the prevention of osteoporosis and the development of targeted therapies. Therefore, in this article, we review Kynurenine and how it plays a vital role in BMSC dysfunction and bone loss with age.
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Saito N, Kanno Y, Yamashita N, Degawa M, Yoshinari K, Nemoto K. The Differential Selectivity of Aryl Hydrocarbon Receptor (AHR) Agonists towards AHR-Dependent Suppression of Mammosphere Formation and Gene Transcription in Human Breast Cancer Cells. Biol Pharm Bull 2021; 44:571-578. [PMID: 33790107 DOI: 10.1248/bpb.b20-00961] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We had previously reported that treatment with the aryl hydrocarbon receptor (AHR) agonist β-naphthoflavone (βNF) suppressed mammosphere formation derived from cancer stem cells in human breast cancer MCF-7 cells (Cancer Lett., 317, 2012, Zhao et al.). Here, using several AHR agonists, we have investigated the association of this suppression with the classical ability to induce AHR-mediated gene transcription in the xenobiotic response element (XRE). The mammosphere formation assays were performed using wild-type and AHR-knockout MCF-7 cells in the presence of AHR agonists including 3-methylcholanthrene (3MC), benzo[a]pyrene (BaP), 7,12-dimethylbenz[a]anthracene (DMBA), 6-formylindolo[3,2-b]carbazole (FICZ), indirubin, indole-3-carbinol (I3C), indole-3-acetic acid (IAA), and kynurenine (KYN), followed by the XRE-reporter gene assays of the agonists. We showed that treatments with 3MC, BaP, and DMBA strongly suppressed mammosphere formation of the stem cells in an AHR-dependent manner, while other agonists showed weaker suppression. In reporter gene assays, the strength or duration of AHR/XRE-mediated gene transcription was found to be dependent on the agonist. Although strong transcriptional activation was observed with 3MC, FICZ, indirubin, I3C, IAA, or KYN after 6 h of treatment, only weak activation was seen with BaP or DMBA. While transcriptional activation was sustained or increased at 24 h with 3MC, BaP, or DMBA, appreciable reduction was observed with the other agonists. In conclusions, the results demonstrated that the suppressive effects of AHR agonists on mammosphere formation do not necessarily correlate with their abilities to induce AHR-mediated gene transcription. Hence, different AHR functions may be differentially induced in an agonist-dependent manner.
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Affiliation(s)
- Nao Saito
- Department of Molecular Toxicology, Faculty of Pharmaceutical Sciences, Toho University
| | - Yuichiro Kanno
- Department of Molecular Toxicology, Faculty of Pharmaceutical Sciences, Toho University.,Laboratory of Molecular Toxicology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Naoya Yamashita
- Department of Molecular Toxicology, Faculty of Pharmaceutical Sciences, Toho University.,Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts
| | - Masakuni Degawa
- Department of Molecular Toxicology, Faculty of Pharmaceutical Sciences, Toho University.,Laboratory of Molecular Toxicology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Kouichi Yoshinari
- Laboratory of Molecular Toxicology, School of Pharmaceutical Sciences, University of Shizuoka
| | - Kiyomitsu Nemoto
- Department of Molecular Toxicology, Faculty of Pharmaceutical Sciences, Toho University
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Riemschneider S, Hoffmann M, Slanina U, Weber K, Hauschildt S, Lehmann J. Indol-3-Carbinol and Quercetin Ameliorate Chronic DSS-Induced Colitis in C57BL/6 Mice by AhR-Mediated Anti-Inflammatory Mechanisms. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18052262. [PMID: 33668818 PMCID: PMC7956562 DOI: 10.3390/ijerph18052262] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/19/2021] [Accepted: 02/20/2021] [Indexed: 12/14/2022]
Abstract
Inflammatory bowel diseases (IBD), such as Crohn’s disease and ulcerative colitis, are multifactorial inflammatory disorders of the gastrointestinal tract, characterised by abdominal cramps, bloody diarrhoea, and anaemia. Standard therapies, including corticosteroids or biologicals, often induce severe side effects, or patients may develop resistance to those therapies. Thus, new therapeutic options for IBD are urgently needed. This study investigates the therapeutic efficacy and safety of two plant-derived ligands of the aryl hydrocarbon receptor (AhR), quercetin (Q), and indol-3-carbinol (I3C), using a translationally relevant mouse model of IBD. Q and I3C are administered by gavage to C57BL/6 wild-type or C57BL/6 Ahr-/- mice suffering from chronic colitis, induced by dextran sulphate sodium (DSS). The course of the disease, intestinal histopathological changes, and in-situ immunological phenotype are scored over 25 days. Our results show that both Q and I3C improved significantly clinical symptoms in moderate DSS colitis, which coincides with a significantly reduced histopathological score. Even in severe DSS colitis I3C, neither Q nor the therapy control 6-thioguanine (6-TG) can prevent a fatal outcome. Moreover, treatment with Q or I3C restored in part DSS-induced loss of epithelial integrity by induction of tight-junction proteins and reduced significantly gut inflammation, as demonstrated by colonoscopy, as well as by immunohistochemistry revealing lower numbers of neutrophils and macrophages. Moreover, the number of Th17 cells is significantly reduced, while the number of Treg cells is significantly increased by treatment with Q or I3C, as well as 6-TG. Q- or I3C-induced amelioration of colitis is not observed in Ahr-/- mice suggesting the requirement of AhR ligation and signalling. Based on the results of this study, plant-derived non-toxic AhR agonists can be considered promising therapeutics in IBD therapy in humans. However, they may differ in terms of efficacy; therefore, it is indispensable to study the dose-response relationship of each individual AhR agonist also with regard to potential adverse effects, since they may also exert AhR-independent effects.
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Affiliation(s)
- Sina Riemschneider
- Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (S.R.); (M.H.); (U.S.)
| | - Maximilian Hoffmann
- Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (S.R.); (M.H.); (U.S.)
| | - Ulla Slanina
- Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (S.R.); (M.H.); (U.S.)
| | | | - Sunna Hauschildt
- Faculty of Life Sciences, University of Leipzig, 04103 Leipzig, Germany;
| | - Jörg Lehmann
- Department of Therapy Validation, Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (S.R.); (M.H.); (U.S.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 04103 Leipzig, Germany
- Correspondence:
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50
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Trajectory Shifts in Interdisciplinary Research of the Aryl Hydrocarbon Receptor-A Personal Perspective on Thymus and Skin. Int J Mol Sci 2021; 22:ijms22041844. [PMID: 33673338 PMCID: PMC7918350 DOI: 10.3390/ijms22041844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/13/2022] Open
Abstract
Identifying historical trajectories is a useful exercise in research, as it helps clarify important, perhaps even “paradigmatic”, shifts in thinking and moving forward in science. In this review, the development of research regarding the role of the transcription factor “aryl hydrocarbon receptor” (AHR) as a mediator of the toxicity of environmental pollution towards a link between the environment and a healthy adaptive response of the immune system and the skin is discussed. From this fascinating development, the opportunities for targeting the AHR in the therapy of many diseases become clear.
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